Biocompo IKBI500 Our compost bins are the perfect choice for anybody who appreciates convenient and ecological solutions for their garden. Biocompo IKBI500 is an easily-mounted robust compost bin of capacity of 500l. Small holes enable air circulation and the closed form prevents animals from accessing waste products stored inside. The moveable flap at the bottom allows the ready fertilizer to be taken out easily. A larger 900-litre version also available.