up for sale , is a lot of 10 norma 50- 70 mm worm drive clamps for silicone hose. these are steel or steel / stainless alloy , they are magnetic, but not strong magnetic. and Black in color . 9mm wide. they are a bit dusty and oily from being in a bin with other clamps , The clamping force of the norma toro silicone clamp is unmatched . these are new and ready to go one sale gets you 45 pcs.i have thousands to sell. thank you.