Where shall i store the blocks in order to keep them usable? What is their durability?

I sotred the one I take to the gym in a plastic case like for sandwich works great, the others in a place where there is no humidity. The durability depends on the use, is a little bit fragile and craks little pieces but this is normal.

Is this chalk suitable for climbing?

I think you can use it as climbing chalk for indoor climbing or gymnastics. For outdoor rockfaces something more specific and much more expensive may be in order.

What size is this chalk? Is it a chalk Block?

Each small box contains a chalk block, the size of your palm. It breaks up easily, so once I put it in a sandwich bag and slightly squeezed it, it fell apart into small chunks.

Do the blocks come in resealable bags?

No, they come wrapped in a paper. I just put my block in a gallon Ziploc baggie so I have room to rub my hands in the bag without making a mess in the gym.

ASIN	B0000BYSM0
Batteries Included	No
Best Sellers Rank	#195,546 in Sports, Fitness & Outdoors ( See Top 100 in Sports, Fitness & Outdoors ) #182 in Climbing Chalk
Brand	gsc evolution
Colour	White
Country of Origin	USA
Customer Reviews	4.1 4.1 out of 5 stars (1,733)
Date First Available	9 August 2012
Height	3.8 Inches
Included Components	(8) 2 oz. Blocks
Item Dimensions LxWxH	19.6 x 18.5 x 9.7 Centimeters
Item Weight	522 g
Length	7.7 Inches
Manufacturer	BSN SPORTS
Number of Items	8
Sport	Gymnastics
Weight	1.15 Pounds
Width	7.3 Inches

BSN Sports GSC Gym Chalk - 1lb

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