Contains X2 Cannisters of 400 Earplugs. The canisters are a level 7 blow-moulded recyclable plastic, which can be recycled just like a water bottle, The new flat top design of the canister allows to place the canister upright for easy refilling with minimal waste. The wider neck opening on the canister allows for ease of refilling with earplugs- no point of congestion, Ratings: NRR 32, SNR 35, SLC80 (corded) 27.5, SLC80 (uncorded) 28.5, CSA A(L), Conforms to EN352-2