Has 4 non marking casters

high gloss sealer/finish for sealing and finishing new or worn granite

Flexible programming options: up to 90 day refill cycle settings

Instant foam action - dispensed as foam

laboratory lenses

Centaur Silento 30 Canister Vacuum Size:Silento 30 with HEPA Filter Has 4 non marking castersThe Silento series is the quietest full power vacuum on the market. It has the same suction and power as the SL 3 with the noise level being low enough to hear a radio during machine's operation. Silento 30 offers 1 speed and Silento 31 offers 2 speeds Has an integrated power outlet for additional option of power brush Triple Filtration: #1 Disposable Dirt Bag, #2 Cloth Filter, #3 Micro Corrugated Filter (5 Micron @ 95%, 99. 97% with HEPA model)