Square pillar (rectangular prism) mold. Can be used with both two-part resin and UV resin. (For UV resin, depending on the liquid and light type, you may need to pour and cure the resin in multiple steps.) I also have molds in various other shapes. If you are interested, please take a look at my other listings. ・Silicone rubber is very prone to dust and debris. While I carefully remove them during packaging, it's sometimes impossible to remove every tiny speck. Also, dust can easily adhere when you open the product after it arrives, so please be careful with storage and during crafting. ・Due to the mold manufacturing process, small burrs may remain on the mold. If you are concerned, please refrain from purchasing or carefully remove them with scissors, etc. ・The color may appear slightly different depending on your monitor environment. Please understand.