Two questions -- are ALL the components plastic (e.g. is the actual hourglass plastic or glass)? And is this waterproof (e.g. ok for shower)?

The exterior components are plastic. It can easily be taken apart by a three year old and the capsule with the sand is a fairly sturdy glass. It seems like it would be fine in a shower.

How consistent are they with each other and how accurate are they to 1 minute?

I had one that was a little slower. I teach first grade so a couple seconds off is okay for me. I just have them read words. 4 out of 5 are right on 1 minute.

Can i get just 2 min for all?

TCR20647 is the product number you need to look for. 2Teachstore

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Combo 4 Pack, Small

Product ID: 5489320

Details

Brand
Teacher
Color
Assorted
Item Weight
2 ounces
Material
Plastic
Product Dimensions
1"D x 1"W x

⏳4 precise countdowns

🎨vibrant assorted colors

📏compact 1"x3.5" size

$14.24

Duties & taxes included

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Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⏳ Beat the clock, own the moment!

TIME YOUR WINS - Four distinct timers (1, 2, 3, 5 minutes) to master every challenge
READY TO USE FUN - Includes suggested activities to jumpstart your time management skills
COMPACT POWERHOUSE - Sleek 1"x3.5" design fits perfectly on any desk or game table
COLOR CODED EFFICIENCY - Bright red, blue, and yellow sands for instant visual tracking
BOOST PRODUCTIVITY PLAY - Ideal for timed tests, games, and managing your workflow with style

The Teacher Created Resources Small Sand Timers Combo Pack features four compact, color-coded sand timers measuring 1" x 3.5" with durations of 1, 2, 3, and 5 minutes. Perfect for enhancing productivity, timed tests, and games, this set includes suggested activities and is a top-rated tool for early childhood education and office use.

Specifications

ASIN	B00KQ6IF3W
Best Sellers Rank	#9,336 in Office Products ( See Top 100 in Office Products ) #149 in Early Childhood Education Materials
Brand Name	Teacher Created Resources
Color	Assorted Colors
Customer Reviews	4.6 4.6 out of 5 stars (3,446)
Global Trade Identification Number	00088231906636
Included Components	1 x Red Sand 1-Minute, 1 x Blue Sand 2-Minute, 1 x Yellow Sand 3-Minute
Item Dimensions D x W x H	1"D x 1"W x 3.5"H
Item Type Name	Small Sand Timers Combo Pack
Item Weight	2 ounces
Manufacturer	Teacher Created Resources OS
Manufacturer Part Number	20663
Manufacturer Warranty Description	Not applicable.
Material Type	Plastic
Model Number	20663
Number of Items	1
Number of Packs	4
Number of settings	4
Screen Size	3.5 inches
UPC	088231906636 799198110423 787718097569
Unit Count	4 Count

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