Kampa Lunar Stack Pads From  £12.99

These are BIG - 15 cm diameter. No dimensions are given on the web page. They come in a decent box (15 x 15 x 18 cm) which I shall keep to store them in. They are hard black plastic, not rubber as they may appear in the photo, and they drain freely. They are quite heavy and not at all flimsy.

They line up nicely below the Kampa Lunar Pads (corner steady feet) without locking onto them. The stack pads themselves do lock to each other with a positive push-fit and come apart well with hand pressure (not tested when wet)- you'd get your hands dirty, though. One to four can be used, giving a lift of 4.5 to 14.5 cm.

Delivery: very fast, just over 24 hours on standard delivery.

Postage: I bought 4 items together, each with £2.95 postage quoted, and was charged £4.50 total for the package. Happy with that.

Works