Non-, non-toxic and light weight. Not easy to break and aging. Simple and can results. Works by pacing your laying queen beneath the queen excluder of your box. The queen will then lay eggs in the cups, this will take no than a day you can release her again. The new eggs are then given a little royal jelly during development, and placed onto the cell blocks and Curler cages. The developed queen cells can then be introduced to her new colony. Usage: Step 1: You insert the comb box into a frame and brown cell cups are fitted into the back of it.(With this kit you will be to raise your own queens and do it without grafting or ever touching a larvae.) : you confine the queen in the front of cage and she immediately eggs in the available cells.She can be realeased in the day. On the 4th day each newly hatched larvae is for transfer. Step 3: You remove each cell cup and insert it into a cell cup holder). Step 4: You then slid this unit onto a cell bar holder which is attached to a cell bar. Step 5: To finish the cells you now put the cell bar into a cell building colony. Product Name: Queen Rearing System Material: Plastic color:Yellow + brown Size: Queen Rearing Cup kit Box: 147x130x28mm Brown Cell Cups: 10x10mm Brown Cell Cup Holder: 26x22x12mm Yellow Cell Bar Holder: 30x22x18mm Hair Roller Cages: 70x26mm Package Included: 1 x Queen Rearing Cupkit Box 100 x Brown Cell Cups 10 x Brown Cell Cup Holder 10 x Yellow Cell Bar Holder 10 x Hair Roller Cages Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.